I didn't have any idea of the size of a cine sensor. Turns out it's a
bit smaller than an APS-C sensor and has a crop factor of a bit less
than 1.4. After applying the appropriate crop factor (which says their
25mm lens has the field of view of a 35mm lens on a full frame sensor) I
computed the hyperfocal distance for a 35mm lens at 40 lines/mm. I was
within a matter of inches of their claimed hyperfocal distance for the
25mm lens at f/8.
That's probably actually fairly stringent for a cine lens. Has anyone
ever seen a sharp cine single frame not badly affected by motion blur?
When it's in motion we don't see see the blur.
Chuck Norcutt
On 10/23/2014 7:25 PM, Mike Gordon via olympus wrote:
Here are the 0.013:
http://www.zeiss.com/content/dam/Photography/new/pdf/en/cine/master_lenses/mp_feet_13.pdf
I think Dr. Focus looked into where one lens differed from the ideal and
by how much a couple years back. Thus the perceived/real dof can indeed
differ using different lenses. Microcontrast, field curvature, exact
focus distance all are important variables affecting real or perceived
dof. Nasse has said a photographer uses these principles as a general
guide but experience is more important than full wave solution tables.
I am not sure why they seem to be useful for the cine lenses though I
have seen clips of a focus puller at work and it was amazing how he
could gauge exact distances by eye.
--
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